New cory has... something.

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Prest12

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I just got a few more cories about a week ago, and one of them has developed white spots on the ends of its fins. They were not there on purchase, I just noticed it earlier today. It’s behavior has not changed at all. I’m going to start daily 50% water changes as soon as I finish writing this, but is would like to know what this is in order to fight it better.
Oh. Yes the tank is cycled, and here are the parameters:
Ammonia: 0
Nitrite: 0
Nitrate: 20
pH: 8
 

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Ghelfaire

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Looks like the beginning of fin rot. Keeping the water pristine will help.
 
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DoubleDutch

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Was the displaytank a barebottom tank ?
 
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RomanNoodles96

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It doesn't look to major although I'm not a cory expert. I would do daily water changes (preferably 50% as you said) and indian almond leaves if you have any. If that doesn't help you may need to switch to some form of medication such as furan-2.
 
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Prest12

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DoubleDutch said:
Was the displaytank a barebottom tank ?
The tank has black diamond blasting sand.
 
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DoubleDutch

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Prest12

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DoubleDutch

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Agree with Roman
 
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BettaFishObsessed

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I would say too high a pH. Cories like a slightly acidic pH, like 6.0-7.0.

not what is wrong, just thought I’d let you know.
 
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RomanNoodles96

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BettaFishObsessed said:
I would say too high a pH. Cories like a slightly acidic pH, like 6.0-7.0.

not what is wrong, just thought I’d let you know.
I dont think ph caused this, and I also think gh is more important in this situation but even then I'm pretty sure Corydoras are adaptive to really any hardness/basicity
 
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BettaFishObsessed

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RomanNoodles96 said:
I dont think ph caused this, and I also think gh is more important in this situation but even then I'm pretty sure Corydoras are adaptive to really any hardness/basicity
I didn’t say the pH caused this, I’m just saying the cories would be happier if it was lower
 
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RomanNoodles96

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BettaFishObsessed said:
I didn’t say the pH caused this, I’m just saying the cories would be happier if it was lower
I never said you did I was just stating that I dont think it caused it either. pH isn't an issue as long as the op doesn't have liquid rock hard water then it should be good.
 
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